The Influence of Microstructure of Arc Sprayed Coatings on Wear Resistance

Majewski, Daniel; Hejwowski, Tadeusz; Łukasik, Daniel

doi:10.12913/22998624/86210

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…There was a predominance of elongated defects (4%), that is, cracks with a shape factor of less than 0.7 51,52 . The value obtained for Vv of cracks and pores was within the expected porosity values for arc thermal spraying (between 2% and 14%) 7,[53][54][55] . The smaller the presence of pores and cracks, the greater the cohesion between layers and the lower the residual stress in the coating 13,48 .…”

Section: Coating Characterizationsupporting

confidence: 80%

Characterization of Fly Ash and a Protective Coating for Brazilian Thermal Power Plant Boilers

et al. 2020

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Thermoelectric power plants that use mineral coal show high wear in heat exchanger due to the action of several damage mechanisms associated with the impact of hard particles from the residue of burnt coal, the ashes. The employment of coatings should be given into consideration particularly for critical components, which are subject to severe erosive conditions is one of the solutions. However, the choice of material will depend on several factors, including the properties of aggressive ashes. This paper aims to characterize ashes generated by a Brazilian coal-based power plant and a FeCrNbNi-based metallic coating obtained by the electric arc spraying process. No trace of sulfur content was found in fly ashes and it was defined that wear is mainly related to the impact and energy of hard particles are the leading causes of degradation in coal-fired boiler equipment. According to the assessment, applied coating showed (5 ± 2)% by volume of pores and cracks, with 1.6% of oxides after the spraying process and hardness 35% greater than ash particles. Preliminary results in field operation suggest that the material showed relatively low wear compared to the original substrate and showed great applicability in controlling material deterioration for this purpose.

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Section: Coating Characterizationsupporting

confidence: 80%

Characterization of Fly Ash and a Protective Coating for Brazilian Thermal Power Plant Boilers

et al. 2020

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“…This element has a strong carbide and borogenic effect, thanks to which more unbound chromium remains in the matrix, which increases corrosion resistance in HCl and HNO3 solutions [2]. Spraying technology with simultaneous remelting of the coating made of these alloys is used to protect boiler heat exchanger pipes against erosion and corrosion [6,7,11,13]. Usually, before applying this type of coating, it is recommended to properly prepare the substrate by using the abrasive blasting method.…”

Section: Introductionmentioning

confidence: 99%

Comparison of tribological properties and structure of coatings produced in powder flame spraying process on grey cast iron

Czupryński¹,

Adamiak²,

Bayraktar³

et al. 2020

Weld. Tech. Rev.

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In this article results of tribological and structural properties comparison of flame sprayed, by SupJet-S-Eutalloy® multipurpose system, two self-fluxing alloys of Ni-B-Si type in the form of powder for spraying with remelting are presented. Layers were produced on EN-GJL-250 grade grey cast iron with flake graphite in an austenitic matrix. Abrasive wear resistance examination acc. to ASTM G65-00 and erosive wear resistance examination acc. to ASTM G76-2 were performed. Obtained results were compared with abrasion-resistant steel Hardox® 400. Macro- and microscopic examination were carried enabling layer quality evaluation and structure of examined layer and base material determination. X-ray microanalysis was performed to obtain qualitative and quantitative data about microareas chemical composition. The Eutalloy® BronzoChrom 10185 powder flame sprayed layer with higher Boron and Silicon content was characterized by 13% lower wear intensity under mineral abrasive conditions and about 30% higher erosion wear resistance than Eutalloy® NiTec 10224 powder flame sprayed layer.

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“…: anodization [22], electrodeposition [23], ionic liquid bath [24], micro arc oxidation [25], physical vapour deposition (PVD) [26,27] and even conversion coatings [28]. Also thermal spraying methods could be used in order to manufacture coatings on magnesium alloys, as follow: cold spray [29], arc spray [30,31], detonationgun [32], flame spray [33] and plasma spray [34,35]. As it was described in previous papers [36,37], high velocity oxy fuel (HVOF) method is the most promising, especially for cermet coatings deposition.…”

Section: Introductionmentioning

confidence: 99%

Investigations on the Microstructure and Corrosion Performance of Different WC-Based Cermet Coatings Deposited by High Velocity Oxy Fuel Process onto Magnesium Alloy Substrate

Jonda¹,

Łatka²,

Maciej³

et al. 2023

Adv. Sci. Technol. Res. J.

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In the field of surface engineering, thermal spraying is very wide adopted in many branches of the industry. The main reasons of such situation are its flexibility as well as cost effectiveness. Among others, high velocity oxy fuel (HVOF) technique is dedicated for spraying hardmetal and cermet coatings, especially for wear-and corrosion resistance. Such type of coating could be a promising candidate as protective layer for magnesium alloys elements. These materials need a strong improvement in the corrosion protection as well as on the field of wear resistance in order to be widely used in the industry. In this work, different WC-based coatings, namely: (i) WC-Co, (ii) WC-Co-Cr and (iii) WC-Cr 3 C 2 -Ni manufactured by HVOF spraying, were investigated. The form of all feedstock materials was agglomerated and sintered powder. All coatings were sprayed with the same technological parameters, especially spray distance which was equal to 400 mm on the AZ91 magnesium alloy substrate. The main aim of the studies was to investigate the influence of the powder material on the corrosion resistance of obtained coatings. The manufactured coatings were examined in terms of its microstructure, using scanning electron microscope (SEM) and corrosion performance, which was assessed in the electrochemical corrosion investigations in 3.5% NaCl solution by Tafel method. The study showed that the corrosion resistance increasing in such order: AZ91 < WC-Cr 3 C 2 -Ni < WC-Co < WC-Co-Cr. It should be stressed that WC-Cr 3 C 2 -Ni coating exhibits very low corrosion performance, which could be effected by relatively high porosity (c.a. 3 vol.%) and because of that the more complex composition promotes creation of many corrosion cells.

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The Influence of Microstructure of Arc Sprayed Coatings on Wear Resistance

Cited by 3 publications

References 12 publications

Characterization of Fly Ash and a Protective Coating for Brazilian Thermal Power Plant Boilers

Characterization of Fly Ash and a Protective Coating for Brazilian Thermal Power Plant Boilers

Comparison of tribological properties and structure of coatings produced in powder flame spraying process on grey cast iron

Investigations on the Microstructure and Corrosion Performance of Different WC-Based Cermet Coatings Deposited by High Velocity Oxy Fuel Process onto Magnesium Alloy Substrate

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